mm43, machinbird;
In re Alternate 2 Law, some time ago on the 2nd thread I posted the schematic below:
* Only in case the AOA, of the remaining ADRs, disagrees with the AOA (as computed by the PRIMs).
(1) Protection is totally lost, in case of VS1g computation failure (loss of weight, or slat/flap position).
(2) Protection is lost, in case of a dual ADR failure (or ADR DISAGREE).
(3) Protection is lost, in case of a triple ADR failure (or ADR DISAGREE).
(4) Bank angle limitation remains effective in ALT 1, which uses roll normal. However, since ALT 1 is in generally an unprotected law, all protection marks on the PFD are in amber for simplicity.
(5) When both elevators have failed, only pitch mechanical backup is available, by using the manual pitch trim control (THS). “MAN PITCH TRIM ONLY” is displayed in red on the PFDs.